Submission #1252670

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252670		pvb.tunglam	Rice Hub (IOI11_ricehub)	C++20	Compilation error	0 ms	0 KiB

ricehub

#include <bits/stdc++.h>
#define hash  _hash_
#define y1    _y1_
#define left  _left_
#define right _right_
#define dec   _dec_
#define int   long long
using namespace std;

/*----------- I alone decide my fate! ------------*/
/*  In the hush of the fields, the hub shall arise…  */

const int MAXR = 100000 + 5;
int R, L, B;
int X[MAXR], pref[MAXR];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(nullptr);

    cin >> R >> L >> B;
    for (int i = 0; i < R; ++i) {
        cin >> X[i];
    }
    // Xây mảng tiền tố: pref[i] = X[0] + … + X[i]
    pref[0] = X[0];
    for (int i = 1; i < R; ++i) {
        pref[i] = pref[i-1] + X[i];
    }

    int ans = 0;
    int l = 0;
    // Duyệt r từ 0…R-1, đẩy l sao cho đoạn [l…r] luôn có cost ≤ B
    for (int r = 0; r < R; ++r) {
        while (l <= r) {
            int m = (l + r) >> 1;
            int leftCnt  = m - l;
            int rightCnt = r - m;
            int sumLeft  = (m-1 >= l) ? (pref[m-1] - (l ? pref[l-1] : 0)) : 0;
            int sumRight = (r >= m+1) ? (pref[r] - pref[m])           : 0;
            int cost = leftCnt * X[m] - sumLeft
                     + sumRight - rightCnt * X[m];
            if (cost <= B) break;
            ++l;
        }
        ans = max(ans, r - l + 1);
    }

    cout << ans << "\n";
    return 0;
}

/*
  …Across the silent paddies, carts will roll,
  For we have placed the hub where numbers told.
*/

Compilation message (stderr)

cc1plus: error: '::main' must return 'int'